《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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主办单位: 苏州混凝土水泥制品研究院
中国混凝土与水泥制品协会

主编 : 李建华
常务副主编 : 王春蓉
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混凝土研究

混凝土配合比设计中的骨料问题研究

王军1，李曦1，徐芬莲1，周永祥2，*，吴晓君2，李少杰3，冷发光4，高超4

2024年第9期

摘要

引用本文

摘要：研究了混凝土配合比中骨料的相关问题。结果表明：混凝土中的骨料可分为天然骨料、机制骨料、废弃物骨料和人造骨料；不同国家的混凝土配合比设计方法步骤不同，我国配合比设计方法中缺乏对骨料级配的模型化计算方法；Talbol通式和Dinger-Funk方程均可用于计算混凝土的骨料级配，当分布指数在0.45~0.50时，C40混凝土的工作性和抗压强度最优；砂石骨料一体化设计获得的级配并不适用于所有强度等级的混凝土，不同分布指数下的骨料级配理论曲线需要考虑其适用的强度等级范围。 Abstract: The related issues of aggregates in concrete mix proportions were studied. The results indicate that aggregates in concrete can be divided into natural aggregates, manufactured aggregates, waste aggregates, and artificial aggregates. The design methods and steps for concrete mix proportions vary in different countries, and there is a lack of modeling calculation methods for aggregate gradation in Chinese mix proportion design methods. Both the Talbol formula and the Dinger-Funk equation can be used to calculate the aggregate gradation of concrete. When the distribution index is between 0.45 and 0.50, the workability and compressive strength of C40 concrete are optimal. The gradation obtained from the integrated design of sand and gravel aggregates is not applicable to all strength grades of concrete. The theoretical curve of aggregate gradation under different distribution indices needs to consider the range of strength grades it is suitable for.

王军,李曦,徐芬莲,等.混凝土配合比设计中的骨料问题研究[J].混凝土与水泥制品,2024(9):1-6,12. WANG J,LI X,XU F L,et al.Research on aggregate issues in concrete mix proportion design[J].China Concrete and Cement Products,2024(9):1-6,12.

混凝土不均匀性的表征及其对硬化性能的影响

刘强1，庞超明2，*，罗时勇2，陈嘉俊2，张萍2

2024年第9期

摘要

引用本文

摘要：为了研究新拌混凝土不均匀性对硬化性能的影响，制备了坍落度在130~260 mm的大流动度C50混凝土，通过砂率、矿物掺合料掺量和减水剂掺量调节混凝土的流动性，取不同部位（中心、边缘）混凝土测试工作性、力学性能、渗透性能等。结果表明：当中心、边缘混凝土骨料离析率组间变异系数不超过5%时，对混凝土的力学性能无明显影响；随着骨料离析率组间变异系数的增加，混凝土力学性能降低；同组间对比时，各组边缘混凝土的氯离子扩散系数、气体渗透系数均高于中心混凝土，中心混凝土的孔隙率较低，有害级孔和多害级孔占比低于边缘混凝土，中心、边缘混凝土的骨料离析率和水胶比组间变异系数较大的组别，孔径分布及孔隙率的差值也较大，氯离子扩散系数和气体渗透系数的差值也较大；总体上，新拌混凝土越均匀，硬化后的综合性能越好。 Abstract: In order to study the effect of inhomogeneity of fresh concrete on its hardened performance, high fluidity C50 concrete with a slump of 130~260 mm was prepared. The fluidity of the concrete was adjusted by sand ratio, mineral admixture content, and polycarboxylate superplasticizer content. Different parts(center, edge) of the concrete were tested for workability, mechanical properties, permeability, etc. The results show that when the coefficient of variation between the segregation rate groups of the center and edge concrete aggregates does not exceed 5%, it has no significant effect on the mechanical properties of concrete. As the coefficient of variation between the segregation rate groups increases, the mechanical properties of concrete decrease. When comparing within the same group, the chloride ion diffusion coefficient and gas permeability coefficient of the edge concrete in each group are higher than those of the center concrete. The porosity of the center concrete is lower, and the proportion of harmful and multi harmful pores is lower than those of the edge concrete. The groups with larger inter group variation coefficients of aggregate segregation rate and water binder ratio in the center and edge concrete also have larger differences in pore size distribution and porosity, and larger differences in chloride ion diffusion coefficient and gas permeability coefficient. Overall, the more uniform the freshly mixed concrete, the better its comprehensive performance after hardening.

刘强,庞超明,罗时勇,等.混凝土不均匀性的表征及其对硬化性能的影响[J].混凝土与水泥制品,2024(9):7-12. LIU Q,PANG C M,LUO S Y,et al.Characterization of concrete inhomogeneity and its influence on the hardened concrete properties[J].China Concrete and Cement Products ,2024(9):7-12.

材料组份对高强环氧灌浆料性能影响研究

李龙梓，彭先兵，孙静娴，易永胜

2024年第5期

摘要

引用本文

摘要：采用正交试验法研究了稀释剂、增韧剂、胶砂比对高强环氧灌浆料的流动度、强度的影响，并研究了2种固化剂掺入比例对高强环氧灌浆料性能的影响。结果表明：稀释剂对环氧灌浆料的流动度影响较大，稀释剂和增韧剂对环氧灌浆料的抗压强度影响较大，但三者对抗折强度影响相对较小；综合考虑工作性和力学性能，建议环氧灌浆料中稀释剂和增韧剂总掺量控制在5%~15%，胶砂比控制在0.35~0.45，且环氧灌浆料的流动度应控制在265 mm以下；固化剂合理复配可以提高环氧灌浆料的流动度，降低反应放热温度，有效控制反应速度，且不会影响环氧灌浆料的后期抗压强度。 Abstract: The influence of diluent, toughening agent, and binder-sand ratio on the fluidity and strength of high strength epoxy grouting material was studied using orthogonal experimental method, and the influence of the blending ratio of two curing agents on the properties of high-strength epoxy grouting material was studied. The results indicate that diluents have a significant impact on the fluidity of epoxy grouting materials, while diluents and toughening agents have a significant impact on the compressive strength of epoxy grouting materials, but their impact on flexural strength is relatively small. Taking into account both workability and mechanical properties, it is recommended to control the total content of diluent and toughening agent in epoxy grouting material between 5% and 15%, the binder-sand ratio between 0.35 and 0.45, and the fluidity of epoxy grouting material should be controlled below 265 mm. Reasonable compounding of curing agents can improve the fluidity of epoxy grouting materials, reduce the exothermic temperature, effectively control the reaction rate, and will not affect the late compressive strength of epoxy grouting material.

李龙梓,彭先兵,孙静娴,等.材料组份对高强环氧灌浆料性能影响研究[J].混凝土与水泥制品,2024(9):13-16. LI L Z,PENG X B,SUN J X,Research on the impact of material components on the performance of high strength epoxy grouting materials[J].China Concrete and Cement Products ,2024(9):13-16.

基于CRITIC-LightGBM算法的混凝土强度预测模型

戚喜章，吴雨航*，钱大桐

2024年第9期

摘要

引用本文

摘要：为了更精确地对混凝土抗压强度进行预测，以水泥、炉渣、粉煤灰、水、减水剂、粗骨料、细骨料、龄期作为混凝土强度预测指标，运用CRITIC算法对指标进行了加权处理，在此基础上，引入新的机器学习算法轻量级梯度提升机（LightGBM）对样本进行了计算训练，同时，运用K-10折交叉验证方式对模型参数进行了优化，最终建立了CRITIC-LightGBM混凝土抗压强度预测模型。运用该模型对混凝土的抗压强度进行了预测，并将结果与LightGBM、多层感知机（MLP）和支持向量机回归（SVR）的预测结果进行了对比。结果表明：与较单一的LightGBM、MLP和SVR算法相比，CRITIC-LightGBM模型预测的平均绝对误差和均方根误差更小，准确性更高，R2更接近1，模型的泛化能力明显提高。 Abstract: In order to predict the compressive strength of concrete more accurately, cement, slag, fly ash, water, water reducer, coarse aggregate, fine aggregate and age were used as the prediction indexes of concrete strength. The CRITIC algorithm was used to weight the indexes. On this basis, a new machine learning algorithm Light Gradient Boosting Machine(LightGBM) was introduced to calculate and train the samples. At the same time, the K-10 fold cross-validation method was used to optimize the model parameters. Finally, the CRITIC-LightGBM model for predicting the compressive strength of concrete was established. The model was used to predict the compressive strength of concrete, and the prediction results were compared with those of LightGBM, multi-layer perceptron(MLP) and support vector machine regression(SVR) algorithm. The results show that compared with the relatively single LightGBM, MLP, and SVR algorithms,the CRITIC-LightGBM prediction model has smaller mean absolute error and root mean square error, and has higher accuracy. R2 is closer to 1, and the generalization ability of the model is significantly improved.

戚喜章,吴雨航,钱大桐.基于CRITIC-LightGBM算法的混凝土强度预测模型[J].混凝土与水泥制品,2024(9):17-20,27. QI X Z,WU Y H,QIAN D T.Prediction model for compressive strength of concrete based on CRITIC-LightGBM algorithm[J].China Concrete and Cement Products ,2024(9):17-20,27.

碱激发粉煤灰对淡化海砂海水混凝土性能的影响

杨健1，徐敏1，杜洪宇1，沈均2，罗驹华2，*

2024年第9期

摘要

引用本文

摘要：研究了水玻璃碱激发剂对不同粉煤灰（FA）掺量的淡化海砂海水混凝土（DSSC）坍落度、抗压强度、氯离子固化能力的影响，并进行了微观分析。结果表明：单掺FA可以增加DSSC的坍落度，而单掺水玻璃则会降低DSSC的坍落度；复掺时，当FA掺量为6%、水玻璃掺量为2%时，DSSC的抗压强度最佳；当FA和水玻璃掺量分别为30%和1%时，DSSC的氯离子固化能力最佳；DSSC中存在C-S-H凝胶对氯离子的物理吸附以及化学结合形成Friedel盐；当FA和水玻璃掺量分别为18%和1%时，DSSC的综合性能较好。 Abstract: The effect of water glass alkali activator on the slump, compressive strength, and chloride ion solidification property of concrete with desalinated seasand and seawater(DSSC) with different fly ash(FA) contents was studied, and microscopic analysis was conducted. The results indicate that the single addition of FA can increase the slump of DSSC, while the single addition of water glass can decrease the slump of DSSC. When mixed, the compressive strength of DSSC is optimal when the FA content is 6% and the water glass content is 2%. When the content of FA and water glass is 30% and 1% respectively, the chloride ion solidification property of DSSC is optimal. In DSSC, C-S-H gel can adsorb chloride ions physically and chemically to form Friedel salt. When the content of FA and water glass is 18% and 1% respectively, the comprehensive performance of DSSC is better.

杨健,徐敏,杜洪宇,等.碱激发粉煤灰对淡化海砂海水混凝土性能的影响[J].混凝土与水泥制品,2024(9):21-27. YANG J,XU M,DU H Y,et al.Effect of alkali activated fly ash on the performance of concrete with desalinated sea sand and seawater[J].China Concrete and Cement Products ,2024(9):21-27.

葡萄糖酸钠与聚羧酸减水剂在水泥基材料中的协同作用研究

畅佳超1，2，王育宏2，胡海力2，黄家叙2，谭锋章2

2024年第9期

摘要

引用本文

摘要：研究了葡萄糖酸钠（SG）与聚羧酸减水剂母液（PC-A、PC-B）复掺对水泥基材料性能的影响，并分析了其协同作用。结果表明：当SG、PC-A单掺时，在相同掺量下，SG对水泥净浆流动度及胶砂减水率的提高有一定的效果，但其减水性和保坍性远低于PC-A；SG、PC-A、PC-B三者复掺时，在水泥颗粒上存在竞争吸附，SG可使聚羧酸减水剂更好地发挥其减水性和保坍性，具有较好的协同作用；从工作性来看，RK-A-7组的SG与聚羧酸减水剂母液复掺比例为最佳；从凝结时间来看，RK-A-4组最佳；从抗压强度来看，RK-A-6组最佳。 Abstract: The effect of sodium gluconate(SG) and polycarboxylate superplasticizer mother liquor(PC-A, PC-B) on the properties of cement-based materials was studied, and their synergistic effect was analyzed. The results show that when SG and PC-A are added separately, at the same content, SG has a certain effect on improving the fluidity of cement paste and the water reduction rate of mortar, but its water reduction and slump retention are much lower than PC-A. When SG, PC-A, and PC-B are mixed together, there is competitive adsorption on cement particles. SG can better enhance the water reducing and slump retaining properties of polycarboxylate superplasticizer, and has a good synergistic effect. From the perspective of workability, the optimal ratio of SG and polycarboxylate superplasticizer mother liquor is achieved in the RK-A-7 group. From the perspective of setting time, the RK-A-4 group is the best. From the perspective of compressive strength, the RK-A-6 group is the best.

CHANG J C,WANG Y H,HU H L,et al.Study on the synergistic effect of sodium gluconate and polycarboxylate superplasticizer in cement-based materials[J].China Concrete and Cement Products,2024(9):28-34,37.

超细石灰石粉对预应力孔道压浆料性能的影响

陈智勇1，刘洋1，*，雍占1，罗鑫2，朱云升2

2024年第9期

摘要

引用本文

摘要：研究了不同掺量超细石灰石粉对预应力孔道压浆料工作性、力学性能、变形性能的影响，并通过XRD、SEM分析了石灰石粉的作用机理。结果表明：随着石灰石粉掺量的增加，压浆料浆体流动度先增大后减小，适宜掺量的石灰石粉对压浆料浆体流动度经时损失有较大改善；压浆料的抗压、抗折强度均随着石灰石粉掺量的增加呈现先增大后减小的趋势，最佳掺量为25%；石灰石粉能够降低压浆料的早期收缩；适宜掺量的石灰石粉对水泥的水化具有促进作用，提高了压浆料内部结构的密实度。 Abstract：The effects of different contents of ultrafine limestone powder on the workability, mechanical properties, and deformation properties of pre-stressed duct grouting materials were studied, and the action mechanism of limestone powder was analyzed through XRD and SEM. The results show that with the increase of limestone powder content, the flowability of the pre-stressed duct grouting material first increases and then decreases. The appropriate content of limestone powder has a significant improvement on the loss of flowability of the pre-stressed duct grouting materials over time. The compressive and flexural strength of pre-stressed duct grouting materials show a trend of first increasing and then decreasing with the increase of limestone powder content, and the optimal content is 25%. Limestone powder can reduce the early shrinkage of pre-stressed duct grouting materials. The appropriate content of limestone powder has a promoting effect on the hydration of cement and improves the compactness of the internal structure of the pre-stressed duct grouting material.

陈智勇,刘洋,雍占,等.超细石灰石粉对预应力孔道压浆料性能的影响[J].混凝土与水泥制品,2024(9):32-37. CHEN Z Y,LIU Y,YONG Z,et al.Influence of ultrafine limestone powder on the properties of pre-stressed duct grouting material[J].China Concrete and Cement Products,2024(9):32-37.

亚硝酸钙对水泥基材料性能的影响

张鹏刚1，2，田旭1，2，董家晏1,2

2024年第9期

摘要

引用本文

摘要：研究了亚硝酸钙对水泥砂浆的流动性、凝结时间、水化热、收缩及强度的影响，并在实际工程中应用。结果表明：掺加亚硝酸钙可提高砂浆的流动度，0.8%～1.4%掺量的亚硝酸钙对砂浆流动度的提高效果相对较好；掺加亚硝酸钙可促进水泥早期水化产物的生成，加速水化反应，使水泥浆体快速凝结，从而缩短初凝和终凝时间，同时还提高了砂浆的早期强度，但会增加砂浆的收缩；当亚硝酸钙掺量为1.0%～1.6%时，砂浆的抗压强度相对较好；工程实际应用表明，掺亚硝酸钙的砂浆可以用于特定环境下建筑结构的修补加固。 Abstract: The effects of calcium nitrite on the fluidity, setting time, hydration heat, shrinkage, and strength of cement mortar were studied and applied in practical engineering. The results show that the addition of calcium nitrite can improve the fluidity of mortar, and the effect of improving the fluidity of mortar is relatively good when the calcium nitrite content is 0.8%~1.4%. The addition of calcium nitrite can promote the generation of early hydration products in cement, accelerate the hydration reaction, and enable the cement slurry to quickly set, thereby shortening the initial and final setting times. At the same time, it also improves the early strength of mortar, but will increase its shrinkage. When the content of calcium nitrite is 1.0%~1.6%, the compressive strength of mortar is relatively good. Practical engineering application shows that mortar mixed with calcium nitrite can be used for repairing and strengthening building structures in specific environments.

张鹏刚,田旭,董家晏.亚硝酸钙对水泥基材料性能的影响[J].混凝土与水泥制品,2024(9):38-41,47. ZHANG P G,TIAN X,DONG J Y.Influence of calcium nitrite on the properties of cement-based materials[J].China Concrete and Cement Products,2024(9):38-41,47.

C60流态混凝土的工作性及强度影响因素试验研究

方敏1，袁文华1，2，张祥驰1，孙克龙1

2024年第9期

摘要

引用本文

摘要：采用单因素法研究了粒径为5~10 mm和10~20 mm粗骨料级配（比例5∶5、6∶4、7∶3、8∶2）、减水剂掺量（1.3%、1.5%、1.7%、1.9%、2.1%）、骨胶比（2.6、2.9、3.2、3.5、3.8）对C60流态混凝土工作性和抗压强度的影响。结果表明：随着5~10 mm石子比例的增加，混凝土的坍落扩展度、J环扩展度和抗压强度均呈先增加后降低的趋势，T500则先降低后增加；随着减水剂掺量的增加，混凝土的坍落扩展度和J环扩展度逐渐增加，T500逐渐降低，抗压强度呈先增加后降低的趋势；随着骨胶比的增加，混凝土的坍落扩展度、J环扩展度和抗压强度先增加后降低，T500先降低后增加；当粒径为5~10 mm和10~20 mm粗骨料级配比例为7∶3、减水剂掺量为1.7%、骨胶比为2.9时，混凝土的综合性能最佳。 Abstract: The single factor method was used to study the effects of coarse aggregate gradation (ratios of 5∶5, 6∶4, 7∶3, 8∶2) with particle sizes of 5~10 mm and 10~20 mm, polycarboxylate superplasticizer content(1.3%, 1.5%, 1.7%, 1.9%, 2.1%), and aggregate binder ratio(2.6, 2.9, 3.2, 3.5, 3.8) on the workability and compressive strength of C60 fluidized concrete. The results show that as the proportion of 5~10 mm stones increases, the slump expansion, J-ring expansion, and compressive strength of concrete show a trend of first increasing and then decreasing, while T500 first decreases and then increases. With the increase of polycarboxylate superplasticizer content, the slump expansion and J-ring expansion of concrete gradually increase, T500 gradually decreases, and the compressive strength shows a trend of first increasing and then decreasing. As the aggregate binder ratio increases, the slump expansion, J-ring expansion, and compressive strength of concrete first increase and then decrease, and T500 first decreases and then increases. When the gradation ratio of coarse aggregates with particle sizes of 5~10 mm and 10~20 mm is 7∶3, the polycarboxylate superplasticizer content is 1.7%, and the aggregate binder ratio is 2.9, the comprehensive performance of concrete is optimal.

方敏,袁文华,张祥驰,等.C60流态混凝土的工作性及强度影响因素试验研究[J].混凝土与水泥制品,2024(9):42-47. FANG M,YUAN W H,ZHANG X C,et al.Experimental study of factors affecting the workability and strength of C60 fluidized concrete[J].China Concrete and Cement Products,2024(9):42-47.

水泥混凝土制品

JCCP三点法外压荷载试验与模拟研究

王法武1，赵利2

2024年第9期

摘要

引用本文

摘要：为验证顶进施工法用钢筒混凝土顶管（JCCP）的承载能力，对JCCP进行了三点法外压荷载试验，并采用ABAQUS有限元软件对试验过程进行了模拟，研究了裂缝产生、扩展过程，并对其影响因素进行了分析。结果表明：底部支撑梁的圆弧转角及其与管体的接触特性对JCCP裂缝的发展和承载能力有显著的影响，有限元模拟时应考虑这些因素。 Abstract: In order to verify the bearing capacity of jacking cylinder concrete pipe(JCCP) using the jacking construction method, the three-edge bearing test was conducted on JCCP, and the test process was simulated using ABAQUS finite element software. The crack generation and propagation process were obtained, and the influencing factors were analyzed. The results show that the arc angle of the bottom support beam and its contact characteristics with the pipe body have a significant impact on the development of cracks and the bearing capacity of JCCP, and these factors need to be considered in the finite element simulation process.

王法武,赵利. JCCP三点法外压荷载试验与模拟研究[J].混凝土与水泥制品,2024(9):48-51,57. WANG F W,ZHAO L.Simulation and analysis of JCCP under three-edge bearing test[J].China Concrete and Cement Products,2024(9):48-51,57.

销钉式抗拔管桩接头抗弯性能试验研究

曹伟伟，严天龙，张芳芳

2024年第9期

摘要

引用本文

摘要：为提高预制混凝土桩的桩间连接质量，研发了一种销钉式机械连接接头。通过销钉式机械连接、销钉式机械连接与焊接连接组合的预制桩桩间接头的抗弯性能试验，对比分析了两种连接方式的受弯承载力、破坏特性与裂缝分布情况。结果表明：两种连接方式的管桩接头试件的开裂弯矩与极限弯矩试验值均大于理论值，满足设计要求；销钉式连接的管桩接头试件破坏形式为销钉受拉脱落，销钉式连接和焊接组合的管桩接头试件破坏形式为接头受压面混凝土破坏；两种连接方式的管桩接头试件在桩身裂缝出现前，各混凝土测点应变呈线性增长，试件跨中截面应变分布基本满足平截面假定。 Abstract: In order to improve the connection performance between prefabricated concrete piles, pin mechanical joints are used. Flexural performance tests were conducted on piles connected with pin mechanical joints, pin mechanical joints and hand welded combination respectively. The flexural capacity, failure characteristics and crack distribution were compared and analyzed. The results show that the measured values of cracking moment and ultimate bending moment are higher than the theoretical values, meeting the joints design requirements. The failure of the specimen with pin mechanical joints is that part of the joints are pulled out, while the failure of the specimen with pin mechanical connection and welding combination is the concrete failure of the joint compression surface. Before the cracks appear, the strain at the concrete measuring points of the specimens increases linearly, and the plane-section assumption agrees well with the results of strain distribution in the mid-span section of the specimens.

曹伟伟,严天龙,张芳芳.销钉式抗拔管桩接头抗弯性能试验研究[J].混凝土与水泥制品,2024(9):52-57. CAO W W,YAN T L,ZHANG F F.Experimental study on flexural behavior of pin type resistant extraction pile mechanical joint[J].China Concrete and Cement Products,2024(9):52-57.

纤维材料及制品

玄武岩纤维混凝土的制备方法及其性能研究

彭飞1, 万磊1，钱朝军1，刘流1，姚硕2，黄镜渟3，储圣洁4，高鹏4,*

2024年第9期

摘要

引用本文

摘要：研究了玄武岩纤维（BF）的形状（短切、束状）、制备方法（湿拌法、半干拌法和干拌法）对混凝土坍落度、抗压强度和劈裂抗拉强度的影响。结果表明：两种BF的掺入均降低了混凝土的坍落度，且短切BF的降低效果更显著；在不同的制备方法下，束状BF的掺入均能提高混凝土的抗压和劈裂抗拉强度；短切BF混凝土的劈裂抗拉强度仅在采用半干拌法时与对照组持平，在采用湿拌法和干拌法时，短切BF混凝土的抗压强度和劈裂抗拉强度均低于对照组。 Abstract: The effects of basalt fiber (BF) shapes (chopped, bundled), preparation methods (wet mixing, semi-dry mixing, dry mixing) on the slump, compressive strength and splitting tensile strength of concrete were investigated. The results show that the incorporation of both kinds of BF reduces the slump of concrete, and the reduction effect of chopped BF is more significant. The incorporation of bundled BF improves the compressive and splitting tensile strength of concrete under different preparation methods. The splitting tensile strength of chopped BF reinforced concrete is only equal to that of the control group when concrete is prepared by semi-dry mixing method, and the compressive strength and splitting tensile strength of chopped BF reinforced concrete are lower than those of the control group when concrete is prepared by wet mixing method or dry mixing method.

彭飞,万磊,钱朝军,等.玄武岩纤维混凝土的制备方法及其性能研究[J].混凝土与水泥制品,2024(9):58-61,66. PENG F,WAN L,QIAN C J,et al.Study on preparation methods and properties of basalt fiber reinforced concrete[J].China Concrete and Cement Products,2024(9):58-61,66.

混杂钢纤维对UHPC弯曲性能的影响研究

王杰，周志威*，邱祥健，谭琪，余中华，冯茂园

2024年第9期

摘要

引用本文

摘要：将不同长度（8、13、16、20 mm）的平直型钢纤维（SF）、波纹型SF分别与长度为13 mm的端钩型SF混掺到UHPC中，研究了不同SF混杂组合对UHPC试件扩展度、抗弯强度和弯曲韧性的影响。结果表明：增加平直型SF和波纹型SF的长度降低了混杂纤维UHPC的扩展度；在受荷初期，UHPC基体与SF共同承受外力，且前者是主要承受者，当UHPC基体开裂后，横跨裂缝的SF成为外力的主要承受者；随着平直型SF和波纹型SF长度的增加，混杂纤维UHPC试件的抗弯强度、峰值挠度基本上呈逐渐增大趋势，弯曲韧性先降低后升高。 Abstract: Flat type and corrugated type steel fibers(SF) of different lengths(8, 13, 16, 20 mm) were blended with end hooked type SF of length of 13 mm into UHPC, respectively, and the effects of different SF hybrid combinations on the extensibility, bending strength and bending toughness of UHPC specimens were investigated. The results show that increasing the length of flat type SF and corrugated type SF leads to a decrease in the extensibility of UHPC with hybrid fibers. At the initial stage of loading, the UHPC matrix and SF share the external force, of which the former is the main bearer, and when the UHPC matrix cracks, the SF across the crack becomes the main bearer of the external force. With the increase of the length of the flat type SF and corrugated type SF, the bending strength and peak deflection of UHPC specimens with hybrid fibers basically tends to increase gradually, and the bending toughness first decreases and then increases.

王杰,周志威,邱祥健,等.混杂钢纤维对UHPC弯曲性能的影响研究[J].混凝土与水泥制品,2024(9):62-66. WANG J,ZHOU Z W,QIU X J,et al.Study on the effect of blended steel fiber on the bending property of UHPC[J].China Concrete and Cement Products,2024(9):62-66.

碳纤维和EPS颗粒对RPC性能的影响

王洪镇1，2，李文琦1，*，甘季中1，2，杨永恒1，2，褚文斌1，温家宝1

2024年第9期

摘要

引用本文

王洪镇,李文琦,甘季中,等.碳纤维和EPS颗粒对RPC性能的影响[J].混凝土与水泥制品,2024(9):67-71. WANG H Z,LI W Q,GAN J Z,et al.Effect of carbon fiber and EPS particles on the performance of RPC[J].China Concrete and Cement Products,2024(9):67-71.

房建材料及制品

水泥及胶粉掺量对砂浆拉伸黏结强度的影响

刘涛，华靖文，张阿瑶，刘佳

2024年第9期

摘要

引用本文

摘要：为提高砂浆拉伸黏结强度，研究了不同水泥及胶粉掺量对砂浆拉伸黏结强度的影响。结果表明：当水泥掺量较低时，增加胶粉掺量能在一定程度上提高砂浆的拉伸黏结强度；当胶粉掺量较小时，增加水泥掺量能显著提高砂浆的拉伸黏结强度；当水泥掺量与胶粉掺量均较大时，同时增大水泥与胶粉掺量会降低砂浆的拉伸黏结强度。 Abstract: In order to improve the tensile bonding strength of mortar, the effects of different cement content and rubber powder content on the tensile bonding strength of mortar were studied. The results show that when the cement content is low, increasing the rubber powder content can improve the tensile bonding strength of mortar. When the content of rubber powder is low, increasing the content of cement has obvious effect on improving the tensile bonding strength of mortar. When the cement content and rubber powder content are both high, increasing the cement content and rubber powder content will reduce the tensile bonding strength of mortar.

刘涛,华靖文,张阿瑶,等.水泥及胶粉掺量对砂浆拉伸黏结强度的影响[J].混凝土与水泥制品,2024(9):72-74,81. LIU T,HUA J W,ZHANG A Y,et al.Effect of cement and rubber powder content on tensile bonding strength of mortar[J].China Concrete and Cement Products,2024(9):72-74,81.

灌浆套筒连接预制混凝土柱抗震性能分析

王衍1，邓夕胜1，李腾1，张鹏1，李友江2 ，李进3

2024年第9期

摘要

引用本文

摘要：为研究灌浆套筒连接预制混凝土柱的抗震性能，利用有限元软件ABAQUS建立了7组灌浆套筒连接预制柱模型，进行了往复荷载下的拟静力分析，讨论了轴压比、长细比和配筋率对灌浆套筒连接预制柱抗震性能的影响。结果表明：各试件延性系数均大于3，有较好的延性；当轴压比由0.3增至0.5时，滞回曲线逐渐由梭形发展为弓形，耗能能力下降，承载力增大7.2%~13.9%，刚度退化加剧；当长细比由4增至6时，试件滞回曲线的捏缩效应加剧，耗能能力下降，承载力下降了23.2%~40.4%，刚度退化加剧；当配筋率由1.24%增至1.79%时，试件的滞回曲线逐渐饱满，耗能能力提高，承载力增加了6.3%~13.8%，刚度退化趋于平缓。 Abstract: In order to study the seismic performance of precast concrete column with grouting sleeve connection, seven groups of precast column models with grouted sleeve connection were established by using the finite element software ABAQUS, and the quasi-static analysis under reciprocating load was carried out. The effects of axial compression ratio, slenderness ratio and reinforcement ratio on the seismic performance of precast column with groutin sleeve connection were discussed. The results show that the ductility coefficient of each specimen is greater than 3, which has good ductility. When the axial compression ratio increases from 0.3 to 0.5, the hysteresis curve gradually develops from spindle to bow, the energy dissipation capacity decreases, the bearing capacity increases by 7.2%~13.9%, and the stiffness degradation increases. When the slenderness ratio increases from 4 to 6, the pinching effect of the hysteresis curve of the specimen increases, the energy dissipation capacity decreases, the bearing capacity decreases by 23.2%~40.4%, and the stiffness degradation increases. When the reinforcement ratio is increased from 1.24% to 1.79%, the hysteresis curve of the specimen is gradually full, the energy dissipation capacity is improved, the bearing capacity is increased by 6.3%~13.8%, and the stiffness degradation tends to be gentle.

王衍,邓夕胜,李腾,等.灌浆套筒连接预制混凝土柱抗震性能分析[J].混凝土与水泥制品,2024(9):75-81. WANG Y, DENG X S,LI T,et al.Seismic performance analysis of precast concrete column connected with grouting sleeve[J].China Concrete and Cement Products,2024(9):75-81.

标准解读

JC/T 2723—2022《预应力混凝土实心方桩》标准解读

蒋元海

2023年第4期

摘要

引用本文

为便于 JC/T 2723—2022《预应力混凝土实心方桩》的使用方准确理解标准条款的具体含义，正确贯彻实施标准条款的具体要求和规定，简述了该标准的编制背景、编制目的和意义，解释说明了标准条文的具体内容，并指出了标准实施过程中应注意的事项。 In order to facilitate the user of JC/T 2723—2022 Prestressed Concrete Solid Square Pile to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2723—2022 are briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.

蒋元海.JC/T 2723—2022《预应力混凝土实心方桩》标准解读[J].混凝土与水泥制品,2023(4):81-84. JIANG Y H.Interpretation on JC/T 2723—2022 Prestressed Concrete Solid Square Pile[J].China Concrete and Cement Products,2023(4):81-84.

检测及试验方法研究

灌浆料测强曲线对龄期与抗压强度的适用性研究

赵建华1，谢慧晟2，张建宇1，凌良建2，周红燕3，吕嘉2

2023年第4期

摘要

引用本文

选择不同灌浆料制作了标准试件和模拟孔道PVC管试件，根据DB32/T 3754—2020《装配整体式混凝土结构检测技术规程》的要求，基于标准试件的抗压强度和模拟孔道PVC管试件的表面硬度建立了灌浆料测强曲线，分析了测强曲线对灌浆料龄期和抗压强度的适用性。结果表明：在灌浆料龄期≥14 d或抗压强度≥60 MPa的情况下，采用DB32/T 3754—2020中的方法建立的灌浆料测强曲线的适用性更强，可为实际工程中不同灌浆料实体抗压强度检测时间的选取提供参考。 Different sleeve grouting materials were selected to make standard test pieces and PVC pipe test pieces with simulated channels. According to the requirements of DB32/T 3754—2020 Technical Specification for Inspection of Monolithic Precast Concrete Structure, the strength curve of the grouting material was established based on the compressive strength of standard test pieces and the surface hardness of PVC pipe test pieces with simulated channels, and the applicability of the strength curve to the age and compressive strength was analyzed. The results show that when the age of grouting material is ≥14 days or the compressive strength of grouting material is ≥60 MPa, the strength test curve of grouting material established by the method in DB32/T 3754—2020 is more applicable, which can provide a reference for the selection of the testing time of the solid compressive strength of different grouting materials in practical projects.

赵建华,谢慧晟,张建宇,等.灌浆料测强曲线对龄期与抗压强度的适用性研究[J].混凝土与水泥制品,2023(4):85-87,92. ZHAO J H,XIE H S,ZHANG J Y,et al.Study on the Applicability of Grouting Material Strength Curve to Age and Compressive Strength[J].China Concrete and Cement Products,2023(4):85-87,92.

节能降碳

废玻璃粉和矿渣对混凝土力学及抗硫酸盐侵蚀性能的影响

乔丽娜1，2，李小娟1，张秀礼1，2，柯雨蛟3，钱慧丽1，*

2024年第9期

摘要

引用本文

摘要：固定废玻璃粉和矿渣的总掺量为30%，研究了废玻璃粉和矿渣的复掺比例对混凝土力学及抗硫酸盐侵蚀性能的影响，其中，废玻璃粉掺量分别为0、5%、10%、15%、20%、25%、30%。结果表明：随着废玻璃粉掺量的增加，试件的抗压强度先增大后减小，总孔隙率先减小后增大，最佳废玻璃粉掺量为10%；随着干湿循环次数的增加或侵蚀溶液浓度的增大，试件表面出现了不同程度的粉化、起砂等现象，质量变化率和抗压强度耐蚀系数均呈先增大后减小的趋势，且随着废玻璃粉掺量的增加，质量变化率的峰值先减小后增大，抗压强度耐蚀系数的峰值先增大后减小；适量废玻璃粉与矿渣在混凝土中有效发挥了颗粒效应、水化效应、交互活性效应等，从而在一定程度上改善了混凝土的力学及抗硫酸盐侵蚀性能。 Abstract: The total content of waste glass powder and slag was fixed at 30%, and the effects of the composite ratio of waste glass powder and slag on the mechanical properties and sulfate attack resistance of concrete were studied. Among which, the content of waste glass powder was 0, 5%, 10%, 15%, 20%, 25%, and 30%, respectively. The results show that as the content of waste glass powder increases, the compressive strength first increases and then decreases, and the total porosity of the specimen first decreases and then increases, and the optimal content of waste glass powder is 10%. As the number of dry-wet cycle increases or the concentration of the corrosive solution increases, different degrees of pulverization and sanding appear on the surface of the specimen, and the rate of mass change and the corrosion resistance coefficient of compressive strength both show a trend of first increasing and then decreasing. Moreover, with the increase of waste glass powder content, the peak value of the rate of mass change first decreases and then increases, and the peak value of the corrosion resistance coefficient of compressive strength first increases and then decreases. The appropriate content of waste glass powder and slag effectively exert particle effect, hydration effect, interactive activity effect, etc. in concrete, thereby improving the mechanical properties and sulfate attack resistance of concrete to a certain extent.

乔丽娜,李小娟,张秀礼,等.废玻璃粉和矿渣对混凝土力学及抗硫酸盐侵蚀性能的影响[J].混凝土与水泥制品,2024(9):86-91. QIAO L N,LI X J,ZHANG X L,et al.Effect of waste glass powder and slag on mechanical properties and sulfate attack resistance of concrete[J].China Concrete and Cement Products,2024(9):86-91.

地铁盾构泥浆制备同步注浆材料的性能研究

韩冰

2024年第9期

摘要

引用本文

摘要：基于某地铁盾构施工产生的盾构泥浆再利用问题，采用盾构泥浆全替代砂，同时掺入减水剂、早强剂、微硅粉、纤维等材料设计并制备了同步注浆材料，采用正交试验法研究了减水剂掺量（1.0%~2.5%）、早强剂掺量（3%~6%）、微硅粉掺量（10%~25%）对同步注浆材料稠度和抗压强度的影响。结果表明：经优化调整得到的同步注浆材料的最佳配合比为盾构泥浆2 000 g、水泥500 g、聚丙烯纤维1 g、减水剂5 g、早强剂25 g、微硅粉125 g、水987.2 g，此时，同步注浆材料的稠度、抗压强度等指标均满足工程要求。 Abstract: Based on the issue of reusing shield tunneling mud generated during shield tunneling construction in a certain subway, the synchronous grouting material was designed and prepared by replacing all sand with shield tunneling mud and adding water reducing agent, early strength agent, micro silica powder, fibers and other materials, and the orthogonal experimental method was used to study the effects of water reducing agent content(1.0%~2.5%), early strength agent content(3%~6%), and micro silicon powder content(10%~25%) on the consistency and compressive strength of synchronous grouting materials. The results show that the optimal mix proportion of synchronous grouting material obtained through optimization and adjustment is 2 000 g of shield tunneling mud, 500 g of cement, 1 g of polypropylene fiber, 5 g of water reducing agent, 25 g of early strength agent, 125 g of micro silica powder, and 987.2 g of water. Besides, the consistency and compressive strength of the synchronous grouting materials meet the engineering requirements.

韩冰.地铁盾构泥浆制备同步注浆材料的性能研究[J].混凝土与水泥制品,2024(9):92-95. HAN B.Study on performance of synchronous grouting materials prepared by subway shield tunneling mud[J].China Concrete and Cement Products,2024(9):92-95.

基于离子色谱法的中水淡化海砂工艺研究

高攀峰，刘帅豪，张健奕，戴源，王利勇，龙绛雪，傅海燕，张祺霖

2024年第9期

摘要

引用本文

摘要：建立了一种采用离子色谱法分析海砂中阴离子的检测方法，验证了该方法的准确度，在此基础上，采用L9（33）正交试验研究了砂水比、洗涤时间、洗涤次数对海砂中Cl-去除率的影响，并进行了成本效益分析。结果表明：采用离子色谱法可快速分离和检测出海砂中的F-、Cl-、Br-、NO3-、SO42-、I-，且准确度较高，相关系数R2均大于0.997 0；当砂水比为1∶20、洗涤时间为10 min、洗涤次数为3次时，对海砂的淡化效果最好，Cl-去除率可达99.8%；采用中水淡化海砂具有显著的环境效益。 Abstract: A detection method for anions in sea sand by using ion chromatography was established, and the accuracy of the method was verified. Based on this, the L9(33) orthogonal test was used to study the effects of sand-water ratio, washing time, and washing frequency on the Cl- removal rate in sea sand, and a cost-benefit analysis was conducted. The results show that using ion chromatography can quickly separate and detect F-, Cl-, Br-, NO3-, SO42-, I-, and the accuracy is high, with correlation coefficients R2 all greater than 0.997 0. When the sand-water ratio is 1∶20, the washing time is 10 minutes, and the washing frequency is 3 times, the desalination effect on sea sand is the best, and the Cl- removal rate can reach 99.8%. The reuse of reclaimed water for desalination of sea sand has significant environmental benefits.

高攀峰,刘帅豪,张健奕,等.基于离子色谱法的中水淡化海砂工艺研究[J].混凝土与水泥制品,2024(9):96-99,105. GAO P F,LIU S H,ZHANG J Y,et al.Study on process of desalination of sea sand using reclaimed water based on ion chromatography[J].China Concrete and Cement Products,2024(9):96-99,105.

常温固化下偏高岭土基高韧性地聚合物复合材料的性能研究

李天歌1，王圣怡1，2，*，占羿箭1，2，3

2024年第9期

摘要

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摘要：以偏高岭土为前驱体，在常温固化条件下制备了高韧性地聚合物复合材料（HTGC），研究了不同粒径偏高岭土的复掺比例、激发剂的浓度和模数、养护龄期对HTGC抗压、抗拉和抗弯性能的影响。结果表明：复掺适量不同粒径的偏高岭土有利于提高HTGC的抗压和抗拉性能；随着激发剂浓度从6 mol/L增至14 mol/L，试件的抗拉和抗压强度增大，拉伸和抗弯延性有所降低；随着激发剂模数从1.2增至2.0，试件抗压和抗拉强度基本有所降低；偏高岭土基HTGC具有明显的早强特性，这使其在快速建造项目中具有较大的应用潜力。 Abstract: High tenacity geopolymer composite(HTGC) were prepared by using metakaolin as a precursor under room temperature curing conditions. The effects of mixing ratios of different particle size metakaolin, concentration and modulus of activator, and curing age on the compressive, tensile, and bending properties of HTGC were studied. The results show that adding an appropriate content of metakaolin with different particle sizes is beneficial for improving the compressive and tensile properties of HTGC. As the concentration of activator increases from 6 mol/L to 14 mol/L, the tensile strength and compressive strength of the specimens increase, while the tensile ductility and bending ductility decrease. As the modulus of the activator increases from 1.2 to 2.0, the compressive strength and tensile strength of the specimens generally decrease. Metakaolin based HTGC has obvious early strength characteristics, which makes it have great potential for application in rapid construction projects.

李天歌,王圣怡,占羿箭.常温固化下偏高岭土基高韧性地聚合物复合材料的性能研究[J].混凝土与水泥制品,2024(9):100-105. LI T G,WANG S Y,ZHAN Y J.Study on properties of metakaolin based high tenacity geopolymer composite under room temperature curing[J].China Concrete and Cement Products,2024(9):100-105.

沸石在中、低水平放射性废液水泥固化中的应用研究

刘景骞

2024年第9期

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摘要：对比研究了不同掺量（0、1%、3%、5%、7%）的斜发沸石和菱沸石对中、低水平放射性废液水泥固化体的流动度、抗压强度、抗浸泡性和抗浸出性的影响。结果表明：适量的斜发沸石或菱沸石均能有效提高水泥固化体的流动度、抗压强度和抗浸泡性；随着沸石掺量的增加，沸石对水泥固化体中90Sr、137Cs的吸附效果随之增强；斜发沸石对90Sr的吸附效果优于菱沸石，而对137Cs的吸附效果弱于菱沸石。 Abstract: The effects of different contents(0, 1%, 3%, 5%, 7%) of clinoptilolite and chabazite on the flowability, compressive strength, immersion resistance, and leaching resistance of cement solidification material of low and medium level radioactive waste liquid were compared and studied. The results show that appropriate content of clinoptilolite or chabazite can effectively improve the flowability, compressive strength, and immersion resistance of cement solidification material. With the increase of the content of zeolite, the adsorption effect of zeolite on 90Sr and 137Cs in cement solidification material is enhanced. The adsorption effect of clinoptilolite on 90Sr is better than that of chabazite, while its adsorption effect on 137Cs is weaker than that of chabazite.

slag cement[J].Journal of Nuclear Materials,2017,483:121-131. [12] LAFOND E,COUMES C C D,GAUFFINET S,et al.Investigation of the swelling behavior of cationic exchange resins saturated with Na+ ions in a C3S paste[J].Cement and Concrete Research,2015,69:61-71. [13] BARRER R M,BARTHOLOMEW R F,REES L V C.Ion exchange in porous crystals part Ⅰ. Self-and exchange-diffusion of ions in chabazites[J].Journal of Physics and Chemistry of Solids,1963,24(1):51-62. [14] BARRER R M,DAVIES J A,REES L V C.Thermodynamics and thermochemistry of cation exchange in chabazite[J].Journal of Inorganic and Nuclear Chemistry,1969,31(1):219-232. [15] BARRER R M,KLINOWSKI J.Influence of framework charge density on ion-exchange properties of zeolites[J].Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases,1972,68:1956-1963. [16] KURONEN M,HARJULA R,JERNSTR?魻M J,et al.Effect of the framework charge density on zeolite ion exchange selectivities[J].Physical Chemistry Chemical Physics,2000,2:2655-2659.

改性铸造废砂对混凝土力学及耐磨性能的影响

芋艳梅，李江华

2024年第9期

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摘要：用水玻璃对铸造废砂进行了改性处理，研究了改性铸造废砂的掺量（0、10%、30%、50%、70%）对混凝土力学性能和耐磨性能的影响。结果表明：随着改性铸造废砂掺量的增加，试件的28 d抗压强度先增大后减小，最佳掺量为10%；随着改性铸造废砂掺量的增加，试件的28 d弹性模量和磨耗量降低，说明弹性变形能力变大，耐磨性能提高。 Abstract: Water glass was used to modify casting waste sand, and the effects of the content(0, 10%, 30%, 50%, 70%) of modified casting waste sand on the mechanical properties and wear resistance of concrete were studied. The results show that with the increase of the content of modified casting waste sand, the 28 d compressive strength of the specimen first increases and then decreases, and the optimal content is 10%. With the increase of the content of modified casting waste sand, the 28 d elastic modulus and abrasion loss of the specimen decrease, indicating an increase in elastic deformation capacity and an improvement in wear resistance.

芋艳梅,李江华.改性铸造废砂对混凝土力学及耐磨性能的影响[J].混凝土与水泥制品,2024(9):110-113. YU Y M,LI J H.Effect of modified casting waste sand on mechanical properties and wear resistance of concrete[J].China Concrete and Cement Products,2024(9):110-113.

基于超声检测的再生混凝土冻融循环损伤机制研究

阿力普江·杰如拉1，2，吴聪1，阿不都塞买提·卡力1，杨彬3

2024年第9期

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摘要：基于超声检测方法，研究了不同冻融循环次数（0、15、30 次）下不同再生粗骨料掺量（0、25%、50%、75%、100%）试件的声速、声时、波形、频率、振幅和力学性能变化，分析了再生混凝土的冻融循环损伤机理。结果表明：随着冻融循环次数和再生粗骨料掺量的增加，试件的抗压强度降低，声时增大，声速基本呈降低趋势，波形图的振幅衰减且波形趋于平缓，频域图的波峰基本呈降低趋势；超声检测参数有效揭示了再生混凝土在冻融循环下的损伤机制，可为再生混凝土的强度和内部缺陷情况评价提供参考。 Abstract: Based on ultrasonic testing method, the changes in sound velocity, sound time, waveform, frequency, amplitude, and mechanical properties of specimens with different recycled coarse aggregate contents (0, 25%, 50%, 75%, 100%) under different freeze-thaw cycles (0, 15, 30) were studied, and the freeze-thaw cycle damage mechanism of recycled concrete was analyzed. The results show that as the number of freeze-thaw cycles and the content of recycled coarse aggregate increase, the compressive strength of the specimen decreases, the sound time increases, and the sound velocity basically shows a decreasing trend. The amplitude of the waveform attenuates and the waveform tends to be flat, while the peak of the frequency domain graph basically shows a decreasing trend. The ultrasonic testing parameters effectively reveal the damage mechanism of recycled concrete under freeze-thaw cycles, which can provide references for the evaluation of the strength and internal defects of recycled concrete.

阿力普江·杰如拉,吴聪,阿不都塞买提·卡力,等.基于超声检测的再生混凝土冻融循环损伤机制研究[J].混凝土与水泥制品,2024(9):114-119. ALIPUJIANG·Jierula, WU Cong, ABUDUSAIMAITI·Kari,et al.Study on freeze-thaw cycle damage mechanism of recycled concrete based on ultrasonic testing[J].China Concrete and Cement Products,2024(9):114-119.

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《混凝土与水泥制品》“3D打印混凝土”与“节能利废混凝土”专题征稿启事

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珊瑚碎屑混凝土的强度特性及破坏形态分析

王磊1,2，范蕾1,2

2015年第1期

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摘要：针对目前对珊瑚碎屑混凝土的力学机理尚不清晰这一问题，对不同龄期和水灰比的珊瑚混凝土试块进行了试验研究。试验结果表明，珊瑚混凝土具有早强、快硬的特点；同时，当水灰比减小到一定程度后，单纯减小水灰比并不能明显提高珊瑚混凝土的抗压强度。本文从材料特性、界面特性以及龄期和水灰比等方面着手，对珊瑚混凝土的强度特性作了详细分析，并介绍了珊瑚混凝土的破坏形态，从而可为珊瑚碎屑应用于海岛混凝土工程提供一定的参考依据。 Abstract: Currently, the mechanical mechanism of coral debris concrete is not well understood, so the research on coral concrete test block in different age and water cement ratio is carried out. The test results show that coral concrete has the characteristics of fast strengthening and hardening, and when the water cement ratio decreases to a certain extent, simply reducing the water cement ratio could not result in obvious additions of compressive strength of coral concrete. From the aspects of material properties, interface properties，age and water cement ratio, the strength characteristics of the coral concrete are analyzed in detail, and the failure pattern is introduced, which can provide reference for application of coral debris in island concrete engineering.

王磊,范蕾. 珊瑚碎屑混凝土的强度特性及破坏形态分析[J].混凝土与水泥制品,2015(1):1-4. WANG L,FAN L.Strength Characteristic and Failure Pattern Analysis on Coral Debris Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(1):1-4.

装配式结构用高强套筒灌浆料性能试验研究

汪秀石，杨智良，吴照学

2015年第2期

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摘要：研究了装配式结构用高强套筒灌浆料的性能，通过试配并进行了流动度、强度和膨胀性试验，优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明，随着水胶比（W/B）增加，流动度逐渐增大，但强度随W/B增加呈现明显降低趋势；减水剂可有效改善流动度，而当掺量过多时对强度有一定的影响；膨胀率随膨胀剂掺量增加呈现增长趋势，但当掺量小于8.0%时，膨胀效果较差，掺量大于12.0%时，对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.

汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.

再生粗骨料强化处理工艺对再生混凝土性能的影响

郭远新，李秋义，孔哲，岳公冰，韩帅

2015年第6期

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摘要：分别采用物理强化、化学强化和物理-化学复合强化三种不同的强化方式对简单破碎再生粗骨料进行强化处理，并采用100%取代天然碎石制备再生粗骨料混凝土，研究了不同强化处理后的再生粗骨料对混凝土工作性能、力学性能、抗渗透性能和抗碳化性能的影响。结果表明，经过强化处理的再生粗骨料混凝土的各项性能均有不同程度的提高，其中经二次物理强化处理后的再生粗骨料混凝土的用水量较天然碎石混凝土仅增加了6kg/m3，其抗压强度也达到最高值，接近于天然碎石混凝土；经二次物理强化和化学浸渍复合强化处理后的再生混凝土氯离子扩散系数降低了13.6%；三种不同的强化方式处理后，再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.

郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.

无砂再生透水混凝土配合比设计

张松涛1，贾欣悦2，宋卓1，贾艳东1

2016年第12期

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张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.

清水混凝土概念、研究现状、存在问题及配合比设计方综述

郭伟1，路林海2，王龙志3，崔鑫3，王桂玲4，张海霞3

2016年第10期

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摘要：20世纪90年代后期以来，清水混凝土研究及工程应用得到了长足发展，许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高，对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究，可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向，以实现清水混凝土技术研究水平的再提高，有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.

郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.

新型装配式建筑构件生产及其施工技术的研究与应用

范玉1,4，徐华2，黄新3，黄继战4，马北京4

2015年第12期

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摘要：通过对建筑PC构件的设计、生产、施工进行的研究，对建筑PC构件进行了再设计及优化，确定了合理的PC构件生产及其施工工艺方案，并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction, construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.

范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.

石墨烯纳米片对水泥基复合材料力学性能的影响

王辉，刘爱红，李航

2015年第12期

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摘要：采用球磨法将石墨烯纳米片分散在水泥基体中，研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明，适量的石墨烯纳米片可均匀分散在水泥基体中，通过桥联效应和拔出效应对水泥基材料起增强增韧作用，当石墨烯纳米片掺量为0.04%时，石墨烯纳米片与水泥基体界面结合良好，没有明显过渡层，试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.

王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.

大型智能PC构件自动化生产线简介

孙红1，孙健1，吴玉厚1，赵凯军2

2015年第3期

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摘要：根据混凝土工厂化生产的需要，阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点；分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程，总结了PC构件生产线的优点和技术创新突破点，可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.

孙红,孙健,吴玉厚,等.大型智能PC构件自动化生产线简介[J].混凝土与水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.

建筑垃圾再生微粉的研究现状

毛新奇1,2，屈文俊1，朱鹏1

2015年第8期

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摘要：建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果，对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述，并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.

毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.

再生粗骨料及再生混凝土性能研究进展

甘福1，周脉席1,3，濮琦2

2018年第9期

摘要

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摘要：结合国内外再生粗骨料混凝土的研究现状，综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容，展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.

甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.

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